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Difference in the number of PubTator predictions in a general set of PubMed articles, selected to be moderately enriched in chemical mentions, and the articles selected for annotation in the NLM-Chem corpus.
| Annotations per abstract in 20 K PubMed articles | Annotations per abstract in NLM-Chem corpus | |
|---|---|---|
| Chemicals | 3.98 | 14.58 |
| Species | 6.23 | 3.45 |
| Gene | 5.91 | 6.29 |
| Disease | 5.07 | 5.69 |
| Mutation | 0.06 | 0.37 |
